PHP学习：详解PHP中websocket的使用方法

PHP应用
<?php
//send用户加入
//send1发送信息
//send2退出登录
error_reporting(E_ALL ^ E_NOTICE);
ob_implicit_flush();
//file_put_contents('lz.text','123', FILE_APPEND);
$sk=new Sock('127.0.0.1',8000);
$sk->run();
class Sock{
 public $sockets;
 public $users;
 public $master;
 
 private $sda=array();//已接收的数据
 private $slen=array();//数据总长度
 private $sjen=array();//接收数据的长度
 private $ar=array();//加密key
 private $n=array();
 
 public function __construct($address, $port){ 
 $this->master=$this->WebSocket($address, $port);//resource(2, Socket)  //服务器监听
 var_dump("master:");
 var_dump($this->master);
 $this->sockets=array($this->master);//array (size=1) 0 => resource(2, Socket) .运行两个php还是这样
 //var_dump($this->sockets);
 //file_put_contents('lz.text',var_dump($this->sockets), FILE_APPEND);
 }
 
 
 function run(){
 while(true){
  $changes=$this->sockets;//$changes由多变1,但$this->sockets却只是稳定的+1;
  
  $write=NULL;
  $except=NULL;
  //1.运行select()系统调用在给定阵列插座与指定的超时
  //2.没有接收到数据就会一直处于阻塞状态,
  //3.若没有client过来,直阻塞进程,直到有client访问,返回1.
  //4.此时返回的changes,不是曾经的changes.虽然还只是一条记录,但已经不是服务器而是客户端
  
   /*select的特殊作用：!!!!!!!
  初始为array(0=>resource(2, Socket))
  1,初始状态返回为array(0=>resource(2, Socket)).但socket_accept可以得到resource(3, Socket)
  2,初始状态返回为array(0=>resource(2, Socket),1=>resource(3,Socket)).
   客户来的客户为resource(3,Socket).则返回的数据为resource(3,Socket).!!!
  
  */
  var_dump($changes);
  $rr=socket_select($changes,$write,$except,NULL);
  var_dump($changes);
  var_dump("---*---");
  //exit;
  /*
  file_put_contents('lz.text',json_encode($changes), FILE_APPEND);
  file_put_contents('lz.text','-----', FILE_APPEND);*/
  
  foreach($changes as $sock){
  //连接主机的client
  
  //$this->master永远是 resource(2, Socket).相当于一个缓存.两种情况,1:为空,使进程阻塞.2：存刚接收的client.
  if($sock==$this->master){ //---此处只用来存数据了
//在socket套接字已创建使用socket_create(),必将与socket_bind()名字,告诉听连接socket_listen(),这个函数将接受传入的连接,插座.
//一旦成功连接,将返回一个!!新的套接字资源!!,该资源可用于通信.如果套接字上有多个连接,则第一个将被使用.
//如果没有挂起的连接,socket_accept()将阻塞直到连接成为现在.如果使用了非阻塞套接字已socket_set_blocking()或socket_set_nonblock(),错误将返回.
//返回socket_accept()插座资源不得用于接受新的连接.原来的听插座插座,但是,仍然是开放的,可以重复使用. 
   $client=socket_accept($this->master); //resource(3, Socket).表示接受请求,并创建一个子链接!!
    //var_dump($client);
   //exit;
   $key=uniqid();
   $this->sockets[]=$client;
   $this->users[$key]=array(  
   'socket'=>$client,
   'shou'=>false
   );
   /*
   array (size=1)
    '57d607085f92a' =>  //$key
   array (size=2)
    'socket' => resource(3, Socket) //$socket的表现都一样,只有通过$key区分
    'shou' => boolean false
    */
   
   
  // file_put_contents('lz.text',json_encode($this->users), FILE_APPEND);
  }else{ //---此处服务器与客户端发信息
   $len=0; 
   $buffer='';
   do{
   /*    
   int socket_recv ( resource socket, string &buf, int len, int flags )
   resource socket 是生成的套接字
   string &buf 是接收缓冲区
   int len 是你打算接收的长度
   int flags 是一个标志
   0x1 数据应该带外发送,所谓带外数据就是TCP紧急数据
   0x2 使有用的数据复制到缓冲区内,但并不从系统缓冲区内删除.
   0x4 不要将包路由出去.
   以上三项与sock.h文件中定义完全相同
   0x8 数据完整记录
   0x100 数据完整处理
   */
   $l=socket_recv($sock,$buf,1000,0);//原来取数据是一个缓慢的过程,要一次一次取数据,并计算每次buf的长度,让总长度不超过设定值
   //var_dump($l);
   // exit;
  // file_put_contents('lz.text','socket_recv', FILE_APPEND);
   $len+=$l;
   $buffer.=$buf;
   }while($l==1000);
   $k=$this->search($sock);//跟据sock返回key值
   if($len<7){ //发过来的消息太短了,系统就判断 断了,断掉链接.
   $this->send2($k);//用户退出.1关闭这个$key值对应的socket、删除这条key记录.将sockets数组对象重新排列.
                 //2
   continue;
   }
   if(!$this->users[$k]['shou']){//判断用户的握手字段是true?否则重新握手.
   $this->woshou($k,$buffer);
   //file_put_contents('lz.text','woshou', FILE_APPEND);
   }else{ //如果用户已经握手,则与用户之间进行通信.终于可以发消息了!
   $buffer = $this->uncode($buffer,$k); //返编译
   
   if($buffer==false){
    continue;
   }
   //var_dump($bufffer);
   //exit;
   $this->send($k,$buffer);
   }
  }
  }
  
 }
 
 }
 
 function close($k){
 socket_close($this->users[$k]['socket']);
 unset($this->users[$k]);
 $this->sockets=array($this->master);
 foreach($this->users as $v){
  $this->sockets[]=$v['socket'];
 }
 $this->e("key:$k close");
 }
 
 function search($sock){
 foreach ($this->users as $k=>$v){
  if($sock==$v['socket'])
  return $k;
 }
 return false;
 }
 
 function WebSocket($address,$port){ //服务器监听
 //创建并返回一个套接字resource,也称作一个通讯节点.一个典型的网络连接由 2 个套接字构成,一个运行在客户端,另一个运行在服务器端. 
 //协议,类型,具体协议
 $server = socket_create(AF_INET, SOCK_STREAM, SOL_TCP); //resource(2, Socket)
 //file_put_contents('lz.text',$server, FILE_APPEND);//supplied resource is not a valid stream resource
    //返回bool.套接字resource,协议级别,可用的socket选项,值.
 $r=socket_set_option($server, SOL_SOCKET, SO_REUSEADDR, 1);//boolean true
 
 //绑定 address 到 socket. 该操作必须是在使用 socket_connect() 或者 socket_listen() 建立一个连接之前. 
 $r2=socket_bind($server, $address, $port);//boolean true
 //在socket套接字已创建使用socket_create()定界与socket_bind()名称,它可以告诉听套接字传入的连接.
 $r3=socket_listen($server);//boolean true
 $this->e('Server Started : '.date('Y-m-d H:i:s'));
 $this->e('Listening on  : '.$address.' port '.$port);
 return $server;
 }
 
 
 function woshou($k,$buffer){
 //对接收到的buffer处理,并回馈握手!!
 $buf = substr($buffer,strpos($buffer,'Sec-WebSocket-Key:')+18);
 $key = trim(substr($buf,0,strpos($buf,"\r\n")));
 
 $new_key = base64_encode(sha1($key."258EAFA5-E914-47DA-95CA-C5AB0DC85B11",true));
 
 $new_message = "HTTP/1.1 101 Switching Protocols\r\n";
 $new_message .= "Upgrade: websocket\r\n";
 $new_message .= "Sec-WebSocket-Version: 13\r\n";
 $new_message .= "Connection: Upgrade\r\n";
 $new_message .= "Sec-WebSocket-Accept: " . $new_key . "\r\n\r\n";
 
 socket_write($this->users[$k]['socket'],$new_message,strlen($new_message));//sokcet,buffer(缓冲区),长度
 $this->users[$k]['shou']=true;
 return true;
 
 } 
 
 function uncode($str,$key){ //返编译
 $mask = array(); 
 $data = ''; 
 $msg = unpack('H*',$str);//unpack() 函数从二进制字符串对数据进行解包.
 $head = substr($msg[1],0,2); 
 if ($head == '81' && !isset($this->slen[$key])) { 
  $len=substr($msg[1],2,2);
  $len=hexdec($len);
  if(substr($msg[1],2,2)=='fe'){
  $len=substr($msg[1],4,4);
  $len=hexdec($len);//hexdec() 函数把十六进制转换为十进制.
  $msg[1]=substr($msg[1],4);
  }else if(substr($msg[1],2,2)=='ff'){
  $len=substr($msg[1],4,16);
  $len=hexdec($len);
  $msg[1]=substr($msg[1],16);
  }
  $mask[] = hexdec(substr($msg[1],4,2)); 
  $mask[] = hexdec(substr($msg[1],6,2)); 
  $mask[] = hexdec(substr($msg[1],8,2)); 
  $mask[] = hexdec(substr($msg[1],10,2));
  $s = 12;
  $n=0;
 }else if($this->slen[$key] > 0){
  $len=$this->slen[$key];
  $mask=$this->ar[$key];
  $n=$this->n[$key];
  $s = 0;
 }
 
 $e = strlen($msg[1])-2;
 for ($i=$s; $i<= $e; $i+= 2) { 
  $data .= chr($mask[$n%4]^hexdec(substr($msg[1],$i,2))); 
  $n++; 
 } 
 $dlen=strlen($data);
 
 if($len > 255 && $len > $dlen+intval($this->sjen[$key])){
  $this->ar[$key]=$mask;
  $this->slen[$key]=$len;
  $this->sjen[$key]=$dlen+intval($this->sjen[$key]);
  $this->sda[$key]=$this->sda[$key].$data;
  $this->n[$key]=$n;
  return false;
 }else{
  unset($this->ar[$key],$this->slen[$key],$this->sjen[$key],$this->n[$key]);
  $data=$this->sda[$key].$data;
  unset($this->sda[$key]);
  return $data;
 }
 
 }
 
 
 function code($msg){ //编译
 $frame = array(); 
 $frame[0] = '81'; 
 $len = strlen($msg);
 if($len < 126){
  $frame[1] = $len<16?'0'.dechex($len):dechex($len);
 }else if($len < 65025){
  $s=dechex($len);
  $frame[1]='7e'.str_repeat('0',4-strlen($s)).$s;
 }else{
  $s=dechex($len);
  $frame[1]='7f'.str_repeat('0',16-strlen($s)).$s;
 }
 $frame[2] = $this->ord_hex($msg); 
 $data = implode('',$frame); 
 return pack("H*", $data); 
 }
 
 function ord_hex($data) { 
 $msg = ''; 
 $l = strlen($data); 
 for ($i= 0; $i<$l; $i++) { 
  $msg .= dechex(ord($data{$i})); 
 } 
 return $msg; 
 }
 
 
 //用户加入
 function send($k,$msg){
 parse_str($msg,$g);//把查询字符串解析到变量中
 $ar=array();
 if($g['type']=='add'){
  $this->users[$k]['name']=$g['ming'];
  $ar['type']='add';
  $ar['name']=$g['ming'];
  $key='all';
 }else{
  $ar['nrong']=$g['nr'];
  $key=$g['key'];
 }
 $this->send1($k,$ar,$key);
 }
 
 function getusers(){
 $ar=array();
 foreach($this->users as $k=>$v){
  $ar[]=array('code'=>$k,'name'=>$v['name']);
 }
 return $ar;
 }
 
 //$k 发信息人的code $key接受人的 code
 function send1($k,$ar,$key='all'){
 $ar['code1']=$key;
 $ar['code']=$k;
 $ar['time']=date('m-d H:i:s');
 $str = $this->code(json_encode($ar));
 if($key=='all'){
  $users=$this->users;
  if($ar['type']=='add'){
  $ar['type']='madd';
  $ar['users']=$this->getusers();
  $str1 = $this->code(json_encode($ar));
  socket_write($users[$k]['socket'],$str1,strlen($str1));//发送者
  unset($users[$k]);
  }
  foreach($users as $v){
  socket_write($v['socket'],$str,strlen($str));//接收者
  }
 }else{
  socket_write($this->users[$k]['socket'],$str,strlen($str));//发送者
  socket_write($this->users[$key]['socket'],$str,strlen($str));//接收者
 }
 }
 
 //用户退出
 function send2($k){
 $this->close($k);
 $ar['type']='rmove';
 $ar['nrong']=$k;
 $this->send1(false,$ar,'all');
 }
 
 function e($str){
 //$path=dirname(__FILE__).'/log.txt';
 $str=$str."\n";
 //error_log($str,3,$path);
 echo iconv('utf-8','gbk//IGNORE',$str);
 }
}
?>

PHP应用
<!doctype html>
<html>
<head>
<meta charset="utf-8">
<meta name="viewport" content="width=device-width, initial-scale=1, user-scalable=no"/>
<title>HTML5 websocket 网页聊天室 javascript php</title>
<style type="text/css">
body,p{margin:0px; padding:0px; font-size:14px; color:#333; font-family:Arial, Helvetica, sans-serif;}
#ltian,.rin{width:98%; margin:5px auto;}
#ltian{border:1px #ccc solid;overflow-y:auto; overflow-x:hidden; position:relative;}
#ct{margin-right:111px; height:100%;overflow-y:auto;overflow-x: hidden;}
#us{width:110px; overflow-y:auto; overflow-x:hidden; float:right; border-left:1px #ccc solid; height:100%; background-color:#F1F1F1;}
#us p{padding:3px 5px; color:#08C; line-height:20px; height:20px; cursor:pointer; overflow:hidden; white-space:nowrap; text-overflow:ellipsis;}
#us p:hover,#us p:active,#us p.ck{background-color:#069; color:#FFF;}
#us p.my:hover,#us p.my:active,#us p.my{color:#333;background-color:transparent;}
button{float:right; width:80px; height:35px; font-size:18px;}
input{width:100%; height:30px; padding:2px; line-height:20px; outline:none; border:solid 1px #CCC;}
.rin p{margin-right:160px;}
.rin span{float:right; padding:6px 5px 0px 5px; position:relative;}
.rin span img{margin:0px 3px; cursor:pointer;}
.rin span form{position:absolute; width:25px; height:25px; overflow:hidden; opacity:0; top:5px; right:5px;}
.rin span input{width:180px; height:25px; margin-left:-160px; cursor:pointer}
#ct p{padding:5px; line-height:20px;}
#ct a{color:#069; cursor:pointer;}
#ct span{color:#999; margin-right:10px;}
.c2{color:#999;}
.c3{background-color:#DBE9EC; padding:5px;}
.qp{position:absolute; font-size:12px; color:#666; top:5px; right:130px; text-decoration:none; color:#069;}
#ems{position:absolute; z-index:5; display:none; top:0px; left:0px; max-width:230px; background-color:#F1F1F1; border:solid 1px #CCC; padding:5px;}
#ems img{width:44px; height:44px; border:solid 1px #FFF; cursor:pointer;}
#ems img:hover,#ems img:active{border-color:#A4B7E3;}
#ems a{color:#069; border-radius:2px; display:inline-block; margin:2px 5px; padding:1px 8px; text-decoration:none; background-color:#D5DFFD;}
#ems a:hover,#ems a:active,#ems a.ck{color:#FFF; background-color:#069;}
.tc{text-align:center; margin-top:5px;}
</style>
</head>
<body>
<div id="ltian">
 <div id="us" class="jb"></div>
 <div id="ct"></div>
  <a href=";" class="qp" onClick="this.parentNode.children[1].innerHTML=''">清屏</a>
</div>
<div class="rin">
  <button id="sd">发送</button>
  <span><img src="http://www.yxsss.com/ui/sk/t.png" title="表情" id="imgbq"><img src="http://www.yxsss.com/ui/sk/e.png" title="上传图片"><form><input type="file" title="上传图片" id="upimg"></form></span>
  <p><input id="nrong"></p>
</div>
<div id="ems"><p></p><p class="tc"></p></div>
<script>
if(typeof(WebSocket)=='undefined'){
 alert('你的浏览器不支持 WebSocket ,推荐使用Google Chrome 或者 Mozilla Firefox'); 
}
</script>
<script src="http://www.yxsss.com/ui/p/a.js" type="text/javascript"></script>
<script>
(function(){
 var key='all',mkey;
 var users={};
 var url='ws://127.0.0.1:8000';
 var so=false,n=false;
 var lus=A.$('us'),lct=A.$('ct');
 function st(){
 n=prompt('请给自己取一个响亮的名字：');
 n=n.substr(0,16);
 if(!n){
  return ; 
 }
 so=new WebSocket(url);
 so.onopen=function(){
  if(so.readyState==1){
    alert('888');
  so.send('type=add&ming='+n);
  }
 }
 
 so.onclose=function(){
  so=false;
  lct.appendChild(A.$$('<p class="c2">退出聊天室</p>'));
 }
 
 so.onmessage=function(msg){
  eval('var da='+msg.data);
  var obj=false,c=false;
  if(da.type=='add'){
  var obj=A.$$('<p>'+da.name+'</p>');
  lus.appendChild(obj);
  cuser(obj,da.code);
  obj=A.$$('<p><span>['+da.time+']</span>欢迎<a>'+da.name+'</a>加入</p>');
  c=da.code;
  }else if(da.type=='madd'){
  mkey=da.code;
  da.users.unshift({'code':'all','name':'大家'});
  for(var i=0;i<da.users.length;i++){
   var obj=A.$$('<p>'+da.users[i].name+'</p>');
   lus.appendChild(obj);
   if(mkey!=da.users[i].code){
   cuser(obj,da.users[i].code);
   }else{
   obj.className='my';
   document.title=da.users[i].name;
   }
  }
  obj=A.$$('<p><span>['+da.time+']</span>欢迎'+da.name+'加入</p>');
  users.all.className='ck';
  }
  
  if(obj==false){
  if(da.type=='rmove'){
   var obj=A.$$('<p class="c2"><span>['+da.time+']</span>'+users[da.nrong].innerHTML+'退出聊天室</p>');
   lct.appendChild(obj);
   users[da.nrong].del();
   delete users[da.nrong];
  }else{
   da.nrong=da.nrong.replace(/{\\(\d+)}/g,function(a,b){
   return '<img src="sk/'+b+'.gif">';
   }).replace(/^data\:image\/png;base64\,.{50,}$/i,function(a){
   return '<img src="'+a+'">';
   });
   //da.code 发信息人的code
   if(da.code1==mkey){
   obj=A.$$('<p class="c3"><span>['+da.time+']</span><a>'+users[da.code].innerHTML+'</a>对我说：'+da.nrong+'</p>');
   c=da.code;
   }else if(da.code==mkey){
   if(da.code1!='all')
   obj=A.$$('<p class="c3"><span>['+da.time+']</span>我对<a>'+users[da.code1].innerHTML+'</a>说：'+da.nrong+'</p>');
   else
   obj=A.$$('<p><span>['+da.time+']</span>我对<a>'+users[da.code1].innerHTML+'</a>说：'+da.nrong+'</p>');
   c=da.code1;
   }else if(da.code==false){
   obj=A.$$('<p><span>['+da.time+']</span>'+da.nrong+'</p>');
   }else if(da.code1){
   obj=A.$$('<p><span>['+da.time+']</span><a>'+users[da.code].innerHTML+'</a>对'+users[da.code1].innerHTML+'说：'+da.nrong+'</p>');
   c=da.code;
   }
  }
  }
  if(c){
   obj.children[1].onclick=function(){
   users[c].onclick();
   }
  }
  lct.appendChild(obj);
  lct.scrollTop=Math.max(0,lct.scrollHeight-lct.offsetHeight);
 }
 }
 A.$('sd').onclick=function(){
 if(!so){
  return st();
 }
 var da=A.$('nrong').value.trim();
 if(da==''){
  alert('内容不能为空');
  return false; 
 }
 A.$('nrong').value='';
 so.send('nr='+esc(da)+'&key='+key);
 }
 A.$('nrong').onkeydown=function(e){
 var e=e||event;
 if(e.keyCode==13){
  A.$('sd').onclick();
 }
 }
 function esc(da){
 da=da.replace(/</g,'<').replace(/>/g,'>').replace(/\"/g,'"');
 return encodeURIComponent(da);
 }
 function cuser(t,code){
 users[code]=t;
 t.onclick=function(){
  t.parentNode.children.rcss('ck','');
  t.rcss('','ck');
  key=code;
 }
 }
 A.$('ltian').style.height=(document.documentElement.clientHeight - 70)+'px';
 st();
 
 var bq=A.$('imgbq'),ems=A.$('ems');
 var l=80,r=4,c=5,s=0,p=Math.ceil(l/(r*c));
 var pt='sk/';
 bq.onclick=function(e){
 var e=e||event;
 if(!so){
  return st();
 }
 ems.style.display='block';
 document.onclick=function(){
  gb(); 
 }
 ct();
 try{e.stopPropagation();}catch(o){}
 }
 
 for(var i=0;i<p;i++){
 var a=A.$$('<a href=";">'+(i+1)+'</a>');
 ems.children[1].appendChild(a);
 ef(a,i);
 }
 ems.children[1].children[0].className='ck';
 
 function ct(){
 var wz=bq.weiz();
 with(ems.style){
  top=wz.y-242+'px';
  left=wz.x+bq.offsetWidth-235+'px';
 }
 }
 
 function ef(t,i){
 t.onclick=function(e){
  var e=e||event;
  s=i*r*c;
  ems.children[0].innerHTML='';
  hh();
  this.parentNode.children.rcss('ck','');
  this.rcss('','ck');
  try{e.stopPropagation();}catch(o){}
 }
 }
 
 function hh(){
 var z=Math.min(l,s+r*c);
 for(var i=s;i<z;i++){
  var a=A.$$('<img src="'+pt+i+'.gif">');
  hh1(a,i);
  ems.children[0].appendChild(a);
 }
 ct();
 }
 
 function hh1(t,i){
 t.onclick=function(e){
  var e=e||event;
  A.$('nrong').value+='{\\'+i+'}';
  if(!e.ctrlKey){
  gb();
  }
  try{e.stopPropagation();}catch(o){}
 }
 }
 
 function gb(){
 ems.style.display='';
 A.$('nrong').focus();
 document.onclick='';
 }
 hh();
 A.on(window,'resize',function(){
 A.$('ltian').style.height=(document.documentElement.clientHeight - 70)+'px';
 ct();
 }) 
 var fimg=A.$('upimg');
 var img=new Image();
 var dw=400,dh=300;
 A.on(fimg,'change',function(ev){
 if(!so){
  st();
  return false;
 }
 if(key=='all'){
  alert('由于资源限制 发图只能私聊');
  return false; 
 }
 var f=ev.target.files[0];
 if(f.type.match('image.*')){
  var r = new FileReader();
  r.onload = function(e){
  img.setAttribute('src',e.target.result);
   };
  r.readAsDataURL(f);
 }
 });
 img.onload=function(){
 ih=img.height,iw=img.width;
 if(iw/ih > dw/dh && iw > dw){
  ih=ih/iw*dw;
  iw=dw;
 }else if(ih > dh){
  iw=iw/ih*dh;
  ih=dh;
 }
 var rc = A.$$('canvas');
 var ct = rc.getContext('2d');
 rc.width=iw;
 rc.height=ih;
 ct.drawImage(img,0,0,iw,ih);
 var da=rc.toDataURL();
 so.send('nr='+esc(da)+'&key='+key);
 }
 
})();
</script>
</body>
</html>